A FORMER CIA worker has revealed how he prevented a devastating attack from China on the US during a bombshell documentary.

Larry Woetzel is chairman of the United States-China Economic and Security Review Commission but formally worked as a CIA agent.He revealed how the CIA was on the verge of purchasing 16,000 computers from a Chinese company, that may have been infected with a virus.Mr Woetzel revealed other US government departments were attacked by computers purchased from the same company.